RHZK6.8 positive pressure fire air respirator is a self-sufficient, self reflective, open, positive pressure air respirator. It has the advantages of comfortable wearing, light weight, low respiratory resistance, safety and reliability. Suitable for departments such as fire protection, chemical engineering, metallurgy, ships, petroleum and gas, warehouses, laboratories, water supply, nuclear industry, factories and mines, providing respiratory protection for firefighters, disaster relief personne